On Mon, Feb 7, 2011 at 10:26 AM, Per Jessen
Greg Freemyer wrote:
Or trust you know what you're doing and ignore parted's optimum alignment. I seriously doubt it will have any impact on your performance with that drive.
At first I tried the 1Mb alignment with an elderly 40Gb Hitachi - made no difference. I was surprised to see up to an extra 2.5Mb/s on the WD 3Tb drive. I'll be trying the same thing with a WD Caviar Black.
Per, Were your performance tests at the same sectors for two different tests? I ask because modern drives have constant RPM but more or less constant linear density, so when working with sectors on the outer edge of the platter more data is incorporated per revolution. Thus you get higher read/write speeds on the outer edge of the platter. Typically drive manufacturers put the low numbered sectors on the outside cylinder. Thus they get max performance and as the sector number increases you get lower and lower performance. The net result is a 2 or 2.5 MB/sec performance difference could easily just be that you are testing different portions of the physical drive and have nothing to do with alignment. Greg -- Greg Freemyer Head of EDD Tape Extraction and Processing team Litigation Triage Solutions Specialist http://www.linkedin.com/in/gregfreemyer CNN/TruTV Aired Forensic Imaging Demo - http://insession.blogs.cnn.com/2010/03/23/how-computer-evidence-gets-retriev... The Norcross Group The Intersection of Evidence & Technology http://www.norcrossgroup.com -- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org For additional commands, e-mail: opensuse+help@opensuse.org